The Mendon plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
Showers likely
Mostly cloudy
Mostly cloudy
Mostly sunny
Partly cloudy
Partly cloudy
Partly cloudy
83° on Nov. 11, 2020, the hottest reading for this week of the year since 1893. Next is 78° in 2022.
Mendon’s center stands about 580 ft above sea level. Within three miles the land runs from 490 ft to 870 ft, a difference of 380 ft: rolling country. The highest named summit within 15 miles is Jakman Hill, about 1,210 ft, 13 miles south-southwest.
Under the town center the state geologic map shows Akron Dolostone, from the Silurian, 422 to 428 million years old.
The section below crosses 11 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 25×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Shale, limestone. Age: Middle Devonian, 384 to 388 million years old. About 4 mi of the line.
Dolostone. Age: Silurian, 425 to 428 million years old. About 3 mi of the line.
Shale. Age: Silurian, 422 to 428 million years old. About 3 mi of the line.
Dolostone. Age: Silurian, 422 to 428 million years old. About 3 mi of the line.
Shale. Age: Silurian, 428 to 434 million years old. About 3 mi of the line.
Shale. Age: Middle Devonian, 384 to 388 million years old. About 2 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 5 smaller units along the line are not listed.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
A raindrop that lands in Mendon reaches Lake Ontario by way of Honeoye Creek and the Genesee: about 40 river miles. From the lake it goes down the St. Lawrence to the Atlantic.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Mendon; river miles along the main stem, rounded.
Mendon has a cold desert climate. Summer afternoons average 81° in July; winter nights fall to about 16° in January. Barely 0.0 inches of rain fall in a normal year.
Normals 1991–2020 and records since 1893 at Victor 2 NW, 3 miles east. NOAA, through RCC-ACIS.
